Shaving implement



Feb. 1, 1938*. .J, MUROS sHAvING IMPLEMENT 2 Sheets-Sheet l Filed May 19, 1956 for Iriver? PWM a 1 ily 5 2 2. ,.5 n I ..l| l-H Il i I w n W Patented Fes. 1,- 193s UNITED STATES PATENT OFFICE y VA2,101,207l f Islauivnvo. mLEMEN'r l Joseph Muros, Cambridge, Massmassignor to Gillette Safety Razor Company, Boston, Masa., a' corporation of Delaware Application May 19, 1936, Serial No. 8.0,568

8 Claims.

This invention relates to shaving implements of the type employing relatively movable shearing' members and generally 'used without lather for shaving.

In one aspect the invention consists in a detachable selfcontained unit comprising aV pair of blades having co-operating shearing surfaces and being connected in relatively movable relation. The blade members may take many forms in accordance with the design of the implement in which they are to be used, but as herein shown they are thin, elongatedand provided with shearing teeth in their longitudinal edges.' A unit of this character may be economically constructed using'blade stock of the general character now employed for safety razor blades or perhaps somewhat thicker material. Such blades may be prepared and sharpened at comparatively little expense and the unit in which they are embodied may be discarded by the user when it has lbecome dull in use in favor of a new or newly sharpened unit. This feature is of importance because in dry shaving implements as heretofore constructed the shearing surfaces have been formed in solid steel members which are expensive to manufacture and which require special grinding machinery. It is not practicable for the user leither to replace orresharpen such members. 'I'he self-contained 'unitof the present invention, on the other hand, may be produced at such relatively low cost that the user can well aord to equip himself with a supply for use in replacement whenever dulling of the shearing' edges becomes noticeable. v

One satisfactory construction for maintaining the individual blades in assembled relation as a self-contained unit is herein shown though alternative constructions will be readily available. It is desirable to maintain the blades with some degree of face-to-f'ace pressure or at least in firm lsurface contact in order to insure effective shear-V ing action. To this end the two blades may be united by flanged fasteners, such as eyelets, in such manner as to cause slight initial spring in the resilient material of the blades. brought about by providing one or both of the blades with an intermediate surface recess orby imparting a slightly bowed initial shape to the blades so that they tend toy bear principallyalong their marginal edges in the zone of the shearing teeth.

` If tubular fasteners are used to hold the blades together, these fasteners may be also utilized as blade-locating means in shaving implements, as for example, by designing them to interflt with This may be blade-locating studs. or the like. As herein shown, the -two blades are connected by'a pairy of spaced flanged eyelets. These eyelets t snugly in one blade while they have a 4slot connection with the other blade permitting limited relative longitudinal motion of the two. By making the fasteners of different vsizes they may be also utilized to insure-the location ofthe unit in the implement always in a selected position.

The invention is herein shown as embodied in a double-'edged implement eective when moved transverselyin either direction across the face of the user, butit may obviously be advantageously embodied in an implement having a single operating face.'

Other features of the invention relate more particularly to the mechanism for detachably securing the blade unit in' operative position and in the mechanismfor imparting rapid vibration to one blade of the unit while the other is held at rest. f These and otherfeatures ofthe invention will be best understood and appreciated from Athe following description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawings, in whichz-e Fig. 1 is a plan View of the implement;

Fig. 2 is a view in side elevation partly in longitudinal section, the casing being broken away;

Fig. 3 is a corresponding view in central crosssection;

Fig. 4 is a fragmentary view in cross-section on the line i-- of Fig. 2;

Figs. 5 and Gare views in' perspective of the upper blade and the lower blade, respectively;

Fig. '7 is a view in perspective of the self-contained blade unit as seen from beneath;

Fig. 8 is a view in cross-section of the blade unit on the line 8-8 of Fig. 7; and

Fig. 9 is a similar vview of a blade unit of modi- I ing forms no part of the present invention. The

casing is provided in its upper end with a rectangular socket in which is removably held an elongated substantially rectangular block l2,

flanged at its opposite upper edges and slottedto present outwardly and oppositely .directed series of guard teeth i3. The guard teeth are curved s smoothly to engage the face of theuser and serve- `to direct the hairs into the shearing spaces of the [the base of each series of guard teeth is a slot I4 which underlies the two shearing zones in the implement, as will be presently described. The block I2 is also provided with a longitudinal pas-v sage substantially square in cross-section, as best shown in Fig. 3, and with a vertical opening I5 which intersects the passage I5 and isVY shouldered at the upper surface thereof, that is, the upper portion of the opening I6 is substantially narrower than the lower portion thereof'l 'The block I2 is also provided with a large rectangular chamber I1 inits lower face. Theblock I2, with the parts carried thereby, is shaped to be received in the socket provided therefor in the end of the casing and may be removably clamped in place by a thumb screw I8 which is threaded through one side of the socket and engages a depression in the outer wall of the block I2.

An operating slide is mounted for reciprocation in the longitudinal passage I5 of the block. The slide is provided with a single upwardly dil rected operating arm 2| which is T-shaped in cross-section and serves as an operating connection between the slide'2ii and the movable blade, Ioi' the implement, as will be presently-described. The slide 25 is also provided with a` pair of spaced downwardly extending arms which embrace the upperrounded end of the operating lever I I. The vertical opening I6 affords sufficient clearance to Apermit the slide 20 to be reciprocated for the full amplitude of its stroke. When the block I2 isl released and 'removed from its position in the casing I0 the upper end of the lever II merely slides out of engagement with the downwardly extending-.arms ofthe slide 20 and this connec/ tion isreadily re-established when the'block is returned to its position.

lso

The shearing unit of theimplement herein shown comprises apair of thin double-edged resilient blades oppositely bevelled at their longitudinal edges and assembled in a self-contained unit under continuous face-to-face pressure. The uppermost and stationary blade 22 of the unit, as best shown in Fig. 5, is provided -with a centrally-disposed rectangular opening 23 which, in

- the assembled implement, is located above the end of the upstanding operating arm 2I of the slide and supplies ample clearance so that the reciprocation of the slide has no effect on the blade`22. The blade is provided-with a circular aperture 24 near one end and with a corresponding but relatively smaller circular laperture 44 near its other end. Both its longitudinal edges are bevelled outwardly and downwardly and are slotted or notched to provide transverse shearing -4 edges.

'I'he lower and movable bladei25 is of the same general shape and character although slightly of the other.

flanged eyelets 23 which are passed through the A'end apertures of the two blades and headed so as to hold them continuously under pressure. In passing through the circular apertures of the uppermost blade 22 the eyelets 23^make a close fit but in passing through the elliptical aperture 21 of the lower blade 25, the eyelets 23 are received with appreciable longitudinal clearance so that the lower blade 25 may be vibrated or recipthe upper face of the block I2 which or that purpose is longitudinally recessed to reduce friction between the said lower blade 25 and the upper face of the block I2. In uniting the co-operating blade members 22 and 25 the eyelets 23 may lbe clinched with sufilcient intensity to spring slightly the relieved portion of the lower blade 25 and thus maintain the two continuously under yielding pressure. The pressure thus developed,

however, is entirely self-contained in the unit.

' The blade unit is retained in shaving position upon the block I2 by means of an elongated clamping plate 30 having alarge key-hole aper-Y ture in the end corresponding to the large circu-l lar aperture 24 of the upper blade and a smaller key-hole aperture in a position corresponding to eis a smaller opening 44 in the same blade. 'I'he I clamping plate 30 is removably held in clamping position by a pair of headedstuds 33 and 34 of unequal diameter.v These are connected at their lowere'nds to a single leaf spring 3 5 which is secured in place upon the roof of the chamber' I1. The leaf spring is bowed to maintain a constant inward tension upon the studs 33 and 34 and the latter are mounted in the-block I2 for limited longitudinal movement. The studs 33 and 34 are each provided with a circular collar 31. of such size as snugly to illl the inside of one or the other of the eyelets 23 and the head of each stud is tapered to a circumferential edge. The clamping plate 30 is provided centrally with a series of .transverse corrugations 35 furnishing a roughened grip by which the clamping plate may be slippedlongitudinally to engagelor disengage its key-hole apertures from the studs 33 and 34.

' As already noted the blades 22 and 25 are assembled with their bevelled edges superposed and converging at each side to a .common edge and with the large circular 'recess 24 of one blade registering with the large elliptical aperture 21 This will bring'the rectangular clearance aperture 23 uppermost in the unit. The unit is designed to be supported upon the upper at face of the block I2, or upon the longitudinal lands formed therein at each side ofoan intermediate recessed zone. Proper location of the unit is insured because the stud 33, which isof the larger diameter, can pass only through the apertures 24 and 21 o! the largerdimensions in the If the unit is presented the wrong end CTI Coming now to the clamping plate 30 the same conditions maintain, that is to say, this plate can be presented only with the large key-hole slotl 3l in registration with the large stud 33. When the unit is properly presented the collar 31 of the stud 33 and the corresponding collar of the stud 34 exactly iill the two eyelets 23,*thus accurately positioning theunit and holding the uppermost blade 22 in stationary position. The clamping plate 30 may now be placed over the stud heads and slipped toward the left] as seen in Figs.'1 and 2, thus forcingthe tapered heads above the slot of the key-hole apertures 3i and, resiliently lifting the studs against the. action of the spring 36 and engaging the uppermost anges of the eyelets 2B thus locking the blade unit in operative position. l

The blade unit may be released for purposes of replacement or cleaning by slipping the clamping plate 30 toward the right, so as to release it by bringing the circular part of the keyhole apertures 3l `and 32 the studs 33'Fand 34.

' In using the implement vabove-described the lower blade 25 is set in rapid vibration and the implement is moved transverselyl in either direction from the face of` the user. The guard teeth I3 thereupon act to direct the hairs to the edge' of the blade unit, straightening those which are bent over and presenting them in the opening between the shearing teeth of the upper stationary blade 22. When they 'reach this position they are at once sheared 0E with a minimum of stubble by the relative movement of the shearing teeth ofthe lower vibratory blade 25. Meanwhile, the skin of the user is prevented by .the

guard teeth from reaching a position in which it might be damaged by themovement of the .rlower blade.

4Afio A slightly modiiled formof blade -unit is sus gested in Fig. 9 where the two resilient blades'42 and' 45 are normally given a slight transverse concavity so that they make contact with each other onlyr in their longitudinal marginal zones. The eyelets I8 in this case, are set so as to spring the blades slightly and maintain them continuously in resilient contact.

Having thus described my'4 invention what I claim as new and desire to secure by Letters Patent of the United states isz- 1. In a shaving' implement, a self-contained unit comprising a pair of elongated blades connected by flanged fasteners under face-to-face pressure, one of the blades being slotted for movement relative to the other.

into registration with 2. In a shaving implement, a self-contained unit comprising a pair of elongated blades ofvsub'- stantially equal width having co-operating lshearing surfaces and being recessed 'for clearance in an intermediate zone, and flanged fasteners for connecting the blades for relative movement under yielding faceto-face pressure. 3. In a shaving implement, a self-contained unit comprising a pair of resilient blades having'l teners extending 'through said blades and connecting them for relative movement with respect to each other. 1

4. In a shaving implement, a self-contained unit comprising a pair of thin resilient blades having co-operating shearing surfaces in their outer edges, one blade having spaced circular perforations and the other elongated perforations, and ilanged lfasteners linserted in said perforations to unite the blades for relative movement.

5. A shaving implement comprising a selfcontainedv unit including connected co-operating shearing blades, a support therefor, a detachable clamp for retaining the unit on the support, guard teeth on the support, and a member op`- eratively connected to one blade and arranged to clear the other.

6. A shaving implement comprising a pair of superposed blades having co-operating shearing surfaces, a-support forl said blades having pro-- iections thereon, and hollow fasteners connecting said blades for relative movement and arranged to be themselves held stationary by `said projections.

'1. In a shaving implement, a yself-contained /readily detachable unitv comprising a pair of elongated blades connected for relative movement in face-to-face engagement, the unit having blade-connecting means presenting locating apertures of respectively diilerent sizes in its opposite ends. 8. A shaving implement comprising a pair of surfaces and tubular fasteners connecting them in movable relation as a self-contained unit. and a carrier having a relieved surface for supporting the movable blade of the pair, means for en- Eaging said tubular fasteners to hold one blade at rest, and. means for vibrating the movable blade.

Jfuuaos. 

